FTP Disconnects Connections

December 1, 2011 at 13:09:49
Specs: Windows 7
I am running FTP on a Windows 2003 IIS server and it keeps disconnecting me after the idle connection has been reached. However, this is happening in the middle of file transfers when the connection is actually active. I am positive this is not an issue with the local machine or firewalls as I am able to upload to more than a dozen other servers without issue and have tried to upload large files to this same server from other machines located on the same network and without any firewall enabled. Installing another FTP server is not an option and is not the solution anyways since IIS is used on several others in the enterprise without issue. I have tried both passive and active transfers both with the same results. I have compared the MetaBase.xml for this server to others and am seeing no differences. Anyone else see this behavior before and have any suggestions to resolve?

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#1
December 4, 2011 at 05:22:37
http://www.iis.net/ConfigReference/...

That site has alot of configuration information. See if it applies. Another site mentioned Sonicwall. Are you using Sonicwall?

How do you know when a politician is lying? His mouth is moving.


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#2
December 5, 2011 at 08:55:45
That site doesn't give any information related to my issue. Talks about server setup which I'm sure is correct and coding examples as well. For now I'm testing with a few different apps so not a coding issue either.

Also, this is a corporate network and no firewalls running at the software level or between the server and client machine. We are running Norton AV but we have an IIS build that we are using on other IIS servers without issue so sure thats not the problem.


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#3
December 5, 2011 at 14:51:24
I'm not sure that Norton isn't the problem. Norton can kill anything. Did you at least disable it temporarily?

How do you know when a politician is lying? His mouth is moving.


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Related Solutions

#4
December 5, 2011 at 15:24:40
Yep disabled it and uninstalled it even, same behavior. So Norton is not the culprit. I figured it wasnt since we are running Norton on approx 75 other IIS servers without issue but did disable and uinstall anyways for good measure.

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#5
December 5, 2011 at 16:46:52
Well done. At least Norton was eliminated as a possibility. Let's go to the event viewer. Is there anything there?

How do you know when a politician is lying? His mouth is moving.


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#6
December 5, 2011 at 17:10:14
Nope, nothing showing in event view and the IIS logs also are showing no errors appear as you would expect to see an idle connection being dropped.

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#7
December 5, 2011 at 17:44:35
Run wireshark on the server. Try to find the RST packet.

How do you know when a politician is lying? His mouth is moving.


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#8
December 7, 2011 at 16:55:13
Finally got to the bottom of this. After requests to the networking group and them telling me that the control port was open to receive responses, enabling passive ftp, etc I had a lengthy conversation with them today. We are using VIP and the correct settings were not applied to the VIP as they had though. Everything is squared away now and no more timeouts on active transfers.

Thanks for your help with this.


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